POLL: Weeding Out Bad GMs?

I am mainly talking about rude or obnoxious GMs. Guys who take too long to set up and cut into gaming time. GMs who bring their lunch and sits down in front of everyone and eats it and then sets up the table (had that happen to me).

A GM who decides he is going to play in another game and says you guys go ahead and play, here are the rules (had that happen to me). Stuff like that.